/*
 * Copyright 2013 Sigurd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package de.digiway.rapidbreeze.server.infrastructure.objectstorage;

/**
 *
 * @author Sigurd
 */
public class ObjectStorageFilter<T> {

    private Class<T> clazz;
    private String orderByProperty;
    private boolean orderByAscending;

    public ObjectStorageFilter(Class<T> clazz) {
        this.clazz = clazz;
        this.orderByAscending = true;
        this.orderByProperty = null;
    }

    public void orderBy(String property, boolean ascending) {
        if (!ObjectStorageHelper.isPropertyAvailable(clazz, property)) {
            throw new IllegalArgumentException("Property:" + property + " does not exist in class:" + clazz);
        }
        if (!Comparable.class.isAssignableFrom(ObjectStorageHelper.getPropertyType(clazz, property))) {
            throw new IllegalArgumentException("The given property:" + property + " does not implement " + Comparable.class.getSimpleName() + " which is required.");
        }
        this.orderByProperty = property;
        this.orderByAscending = ascending;
    }

    public String getOrderByProperty() {
        return orderByProperty;
    }

    public boolean isOrderByAscending() {
        return orderByAscending;
    }

    public Class<T> getClazz() {
        return clazz;
    }
}
